(1)Administrative users
1)adds the admin column to the users table
$ rails generate migration add_admin_to_users admin:boolean
$ vi db/migrate/…._add_admin_to_users.rb
class AddAdminToUsers < ActiveRecord::Migration def change add_column :users, :admin, :boolean, default: false end end
2)migrate
$ bundle exec rake db:migrate
3)sample data
$ rails console
2.0.0p247 :001 > adminuser = User.create(name: "admin", email: "admin@example.com", password: "xxxxx", password_confirmation: "xxxxx",admin: true)
2.0.0p247 :002 > adminuser.admin?
=> true
(2)Rails controller
1)destroy action
$ vi app/controllers/users_controller.rb
def destroy User.find(params[:id]).destroy head :no_content end
2)users have to be logged in to delete users
$ vi app/controllers/users_controller.rb
before_action :signed_in_user, only: [:index,:update,:destroy]
3)only admins can delete users
$ vi app/controllers/users_controller.rb
before_action :admin_user, only: :destroy ...... private ........ def admin_user remember_token = User.encrypt(cookies[:remember_token]) current_user ||= User.find_by(remember_token: remember_token) render status: :unauthorized unless current_user.admin? end
(3)AngularJS template view
$ vi app/assets/templates/users/index.html.erb
<ul ng-repeat="user in currentitems" class="users"> <li> <img alt="{{user.name}}" src="https://secure.gravatar.com/avatar/{{hash(user.email)}}?s=52" /> <a href="/users/{{user.id}}">{{user.name}}</a> <a ng-show="{{ychkAdmin}}" href="" ng-click="delete(user.id)">| delete</a> </li> </ul>
(4)AngularJS controller
$ vi app/assets/javascripts/mymodule.js.erb
myModule.controller("UsersIndexCtrl", function($scope, userResource, flashService, $location, sessionResource, $q) { ...... var deferred = $q.defer(); deferred.promise.then(function (result) { var user_info = result; if (user_info.user.id > 0) { $scope.chkAdmin = user_info.user.admin; userResource.index({}, function(response) { $scope.users = response; $scope.totalitems = $scope.users.length; $scope.currentitems = $scope.users.slice(start,end); $scope.$watch('currentpage', function() { start = ($scope.currentpage - 1) * $scope.itemsperpage; end = start + $scope.itemsperpage; $scope.currentitems = $scope.users.slice(start,end); },true); }); } else { $location.path("/signin"); } },function (reason) { console.log("qgetUser-Error"); }) qgetUser (deferred); ...... $scope.delete = function(id) { userResource.destroy({ id: id }); userResource.index({}, function(response) { $scope.users = response; $scope.totalitems = $scope.users.length; $scope.currentitems = $scope.users.slice(start,end); }); }; });